After having my Morrowind GOTY for 11 years, it finally happened: I lost a disc. The most important disc actually, the Morrowind disc itself. Looked everywhere for it. The Tribunal, Bloodmoon, and CS discs are all where they should be, but the Morrowind disc has just completely disappeared.

Do I have any options here besides buying the game again?

Not unless you decide to do something we can't speak of on the forums due to it's (il)legal nature.

Good news is you can buy it from Steam for 20 bucks.